By b_style on

I setup an NFS mount for the Drupal files directory using the following tutorial and everything seems to work perfectly:
http://www.howtoforge.com/setting-up-an-nfs-server-and-client-on-ubuntu-...

However, the file_prepare_directory() function is not behaving properly and is preventing file uploads to my site. When this function is called, the PHP is_writable() function returns back FALSE when the &$directory parameter is a public stream wrapper (public://...).

This is exactly the line 417 of file.inc that returns false:
$writable = is_writable($directory);

If I make a small modification to use the deprecated drupal_realpath() function to unpack the stream wrapper, then the function returns TRUE as expected:
$writable = is_writable(drupal_realpath($directory));

Does anybody else have the same problem or know a solution?
NFS seems to be a common solution for running Drupal 7 on a cluster, so I can't believe I am the first person to discover this issue!?!?

⋅ Categories: Drupal 7.x

Comments

gabrimonfa’s picture

gabrimonfa commented

In our setup a virtual machine with Drupal 7 has the files directory (which is mapped to public:// stream) exposed via NFS4.
Directory permissions are the following

drwxr-xr-x 8 nobody nogroup

The directory is writable by web server user (www-data).

is_writable(PATH_OF_THE_FILES_DIRECTORY) returns true
is_writable('public://') returns false

To be noted that in another (older) setup we used NFS3 mapping uid and guid between host server and guest virtual machine, and no issues arose.

dooug’s picture

dooug commented

It looks like this is an ancient known issue: #944582: Check for execute permissions on directories that require file write permissions